Lens

A lens, comprising:

• an optical portion at a central position;
• and
• a bearing portion surrounding the optical portion,
• wherein the bearing portion comprises a first surface, a second surface opposite to the first surface, and a connection surface connecting the first surface with the second surface;
• the first surface is provided with a first arc surface and a first planar surface;
• an intersection line between the first arc surface and the first planar surface is a first feature circle for measuring an interfacial decenter;
• the second surface is provided with a second arc surface and a second planar surface;
• an intersection line between the second arc surface and the second planar surface is a second feature circle for measuring the interfacial decenter;
• a radius of the first feature circle is not equal to a radius of the second feature circle, wherein a first angle between a tangent plane of the first arc surface at the first feature circle and the first planar surface is smaller than or equal to 10° and a second angle between a tangent plane of the second arc surface at the second feature circle and the second planar surface is smaller than or equal to 10°.